After months of gloomy predictions, Democrats are investing anew in flipping Republican seats. They are also directing more money to protect a roster of their own endangered incumbents — a list party officials said noticeably shrank since the spring. And they are trying to frame contests around abortion rights, putting Republicans on the defensive for strict opposition to the procedure in the wake of the Supreme Court overturning Roe v. Wade.

Democratic fundraisers have reported an uptick in donations over the last month, and at least one of the party’s biggest donors is considering pouring more money into House races, according to people with knowledge of the situation.

Speaker Nancy Pelosi (D-Calif.) is privately voicing more confidence about the House landscape and opportunities to go on offense, people familiar with the conversations said, while President Biden’s White House has grown more optimistic in its outlook. One Biden adviser reacted with umbrage at a private meeting with reporters this month to the suggestion that Republicans were likely to win back control of Congress.

While Democrats acknowledge they still face major hurdles, there has been an unmistakable mood shift, according to interviews with candidates, strategists and officials. What was once a party privately bracing for dozens of losses is now one reassessing the House landscape and shifting to a more offensive posture with about 10 weeks left before Election Day.